Cargando…
A tunable azine covalent organic framework platform for visible light-induced hydrogen generation
Hydrogen evolution from photocatalytic reduction of water holds promise as a sustainable source of carbon-free energy. Covalent organic frameworks (COFs) present an interesting new class of photoactive materials, which combine three key features relevant to the photocatalytic process, namely crystal...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598847/ https://www.ncbi.nlm.nih.gov/pubmed/26419805 http://dx.doi.org/10.1038/ncomms9508 |
_version_ | 1782394141931470848 |
---|---|
author | Vyas, Vijay S. Haase, Frederik Stegbauer, Linus Savasci, Gökcen Podjaski, Filip Ochsenfeld, Christian Lotsch, Bettina V. |
author_facet | Vyas, Vijay S. Haase, Frederik Stegbauer, Linus Savasci, Gökcen Podjaski, Filip Ochsenfeld, Christian Lotsch, Bettina V. |
author_sort | Vyas, Vijay S. |
collection | PubMed |
description | Hydrogen evolution from photocatalytic reduction of water holds promise as a sustainable source of carbon-free energy. Covalent organic frameworks (COFs) present an interesting new class of photoactive materials, which combine three key features relevant to the photocatalytic process, namely crystallinity, porosity and tunability. Here we synthesize a series of water- and photostable 2D azine-linked COFs from hydrazine and triphenylarene aldehydes with varying number of nitrogen atoms. The electronic and steric variations in the precursors are transferred to the resulting frameworks, thus leading to a progressively enhanced light-induced hydrogen evolution with increasing nitrogen content in the frameworks. Our results demonstrate that by the rational design of COFs on a molecular level, it is possible to precisely adjust their structural and optoelectronic properties, thus resulting in enhanced photocatalytic activities. This is expected to spur further interest in these photofunctional frameworks where rational supramolecular engineering may lead to new material applications. |
format | Online Article Text |
id | pubmed-4598847 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-45988472015-10-21 A tunable azine covalent organic framework platform for visible light-induced hydrogen generation Vyas, Vijay S. Haase, Frederik Stegbauer, Linus Savasci, Gökcen Podjaski, Filip Ochsenfeld, Christian Lotsch, Bettina V. Nat Commun Article Hydrogen evolution from photocatalytic reduction of water holds promise as a sustainable source of carbon-free energy. Covalent organic frameworks (COFs) present an interesting new class of photoactive materials, which combine three key features relevant to the photocatalytic process, namely crystallinity, porosity and tunability. Here we synthesize a series of water- and photostable 2D azine-linked COFs from hydrazine and triphenylarene aldehydes with varying number of nitrogen atoms. The electronic and steric variations in the precursors are transferred to the resulting frameworks, thus leading to a progressively enhanced light-induced hydrogen evolution with increasing nitrogen content in the frameworks. Our results demonstrate that by the rational design of COFs on a molecular level, it is possible to precisely adjust their structural and optoelectronic properties, thus resulting in enhanced photocatalytic activities. This is expected to spur further interest in these photofunctional frameworks where rational supramolecular engineering may lead to new material applications. Nature Pub. Group 2015-09-30 /pmc/articles/PMC4598847/ /pubmed/26419805 http://dx.doi.org/10.1038/ncomms9508 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Vyas, Vijay S. Haase, Frederik Stegbauer, Linus Savasci, Gökcen Podjaski, Filip Ochsenfeld, Christian Lotsch, Bettina V. A tunable azine covalent organic framework platform for visible light-induced hydrogen generation |
title | A tunable azine covalent organic framework platform for visible light-induced hydrogen generation |
title_full | A tunable azine covalent organic framework platform for visible light-induced hydrogen generation |
title_fullStr | A tunable azine covalent organic framework platform for visible light-induced hydrogen generation |
title_full_unstemmed | A tunable azine covalent organic framework platform for visible light-induced hydrogen generation |
title_short | A tunable azine covalent organic framework platform for visible light-induced hydrogen generation |
title_sort | tunable azine covalent organic framework platform for visible light-induced hydrogen generation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598847/ https://www.ncbi.nlm.nih.gov/pubmed/26419805 http://dx.doi.org/10.1038/ncomms9508 |
work_keys_str_mv | AT vyasvijays atunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT haasefrederik atunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT stegbauerlinus atunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT savascigokcen atunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT podjaskifilip atunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT ochsenfeldchristian atunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT lotschbettinav atunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT vyasvijays tunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT haasefrederik tunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT stegbauerlinus tunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT savascigokcen tunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT podjaskifilip tunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT ochsenfeldchristian tunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration AT lotschbettinav tunableazinecovalentorganicframeworkplatformforvisiblelightinducedhydrogengeneration |